[Java] JDK9 설치 이후 Eclipse / STS 구동 시 오류해결

JDK9가 드디어 정식 릴리즈 됨.

http://www.oracle.com/technetwork/java/javase/downloads/jdk9-downloads-3848520.html

다운받아서 설치하고 환경변수를 잡은 뒤 STS를 실행했으나, 아래와 같은 에러가 발생함.

eclipse.buildId=3.9.0.201707061823-RELEASE-e47
java.version=9
java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=ko_KR
Framework arguments:  -product org.springsource.sts.ide
Command-line arguments:  -os win32 -ws win32 -arch x86_64 -product org.springsource.sts.ide

!ENTRY org.eclipse.osgi 4 0 2017-09-22 09:53:56.501
!MESSAGE Application error
!STACK 1
org.eclipse.e4.core.di.InjectionException: java.lang.NoClassDefFoundError: javax/annotation/PostConstruct
	at org.eclipse.e4.core.internal.di.InjectorImpl.internalMake(InjectorImpl.java:410)
	at org.eclipse.e4.core.internal.di.InjectorImpl.make(InjectorImpl.java:318)
	at org.eclipse.e4.core.contexts.ContextInjectionFactory.make(ContextInjectionFactory.java:162)
	at org.eclipse.e4.ui.internal.workbench.swt.E4Application.createDefaultHeadlessContext(E4Application.java:491)
	at org.eclipse.e4.ui.internal.workbench.swt.E4Application.createDefaultContext(E4Application.java:505)
	at org.eclipse.e4.ui.internal.workbench.swt.E4Application.createE4Workbench(E4Application.java:204)
	at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:614)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:594)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:151)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:564)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:653)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:590)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1499)
Caused by: java.lang.NoClassDefFoundError: javax/annotation/PostConstruct
	at org.eclipse.e4.core.internal.di.InjectorImpl.inject(InjectorImpl.java:124)
	at org.eclipse.e4.core.internal.di.InjectorImpl.internalMake(InjectorImpl.java:399)
	... 22 more
Caused by: java.lang.ClassNotFoundException: javax.annotation.PostConstruct cannot be found by org.eclipse.e4.core.di_1.6.100.v20170421-1418
	at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:433)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:395)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:387)
	at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:150)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:496)
	... 24 more

!ENTRY org.eclipse.e4.ui.workbench 4 0 2017-09-22 09:53:56.515
!MESSAGE FrameworkEvent ERROR
!STACK 0
java.lang.NoClassDefFoundError: javax/annotation/PreDestroy
	at org.eclipse.e4.core.internal.di.InjectorImpl.disposed(InjectorImpl.java:450)
	at org.eclipse.e4.core.internal.di.Requestor.disposed(Requestor.java:156)
	at org.eclipse.e4.core.internal.contexts.ContextObjectSupplier$ContextInjectionListener.update(ContextObjectSupplier.java:78)
	at org.eclipse.e4.core.internal.contexts.TrackableComputationExt.update(TrackableComputationExt.java:111)
	at org.eclipse.e4.core.internal.contexts.TrackableComputationExt.handleInvalid(TrackableComputationExt.java:74)
	at org.eclipse.e4.core.internal.contexts.EclipseContext.dispose(EclipseContext.java:178)
	at org.eclipse.e4.core.internal.contexts.osgi.EclipseContextOSGi.dispose(EclipseContextOSGi.java:99)
	at org.eclipse.e4.core.internal.contexts.osgi.EclipseContextOSGi.bundleChanged(EclipseContextOSGi.java:141)
	at org.eclipse.osgi.internal.framework.BundleContextImpl.dispatchEvent(BundleContextImpl.java:908)
	at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
	at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148)
	at org.eclipse.osgi.internal.framework.EquinoxEventPublisher.publishBundleEventPrivileged(EquinoxEventPublisher.java:213)
	at org.eclipse.osgi.internal.framework.EquinoxEventPublisher.publishBundleEvent(EquinoxEventPublisher.java:120)
	at org.eclipse.osgi.internal.framework.EquinoxEventPublisher.publishBundleEvent(EquinoxEventPublisher.java:112)
	at org.eclipse.osgi.internal.framework.EquinoxContainerAdaptor.publishModuleEvent(EquinoxContainerAdaptor.java:168)
	at org.eclipse.osgi.container.Module.publishEvent(Module.java:476)
	at org.eclipse.osgi.container.Module.doStop(Module.java:634)
	at org.eclipse.osgi.container.Module.stop(Module.java:498)
	at org.eclipse.osgi.container.SystemModule.stop(SystemModule.java:202)
	at org.eclipse.osgi.internal.framework.EquinoxBundle$SystemBundle$EquinoxSystemModule$1.run(EquinoxBundle.java:165)
	at java.base/java.lang.Thread.run(Thread.java:844)
Caused by: java.lang.ClassNotFoundException: javax.annotation.PreDestroy cannot be found by org.eclipse.e4.core.di_1.6.100.v20170421-1418
	at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:433)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:395)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:387)
	at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:150)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:496)
	... 21 more

해결책은 eclipse.ini 또는 sts.ini 파일을 열어서 -vmargs 하위에 아래와 같은 argument를 넣어주면 된다.

-vmargs
--add-modules=java.se.ee

이렇게까지 했는데도 동일하게 에러가 발생한다면, IDE자체에서 JDK9를 싫어하는 것이므로, Eclipse Oxygen 이상의 버전으로 올려야 한다.

그런데... IDE 정상 구동까지는 잘되지만, IDE 내부에서 Compiler 지원을 JDK8까지밖에 하지 않기 때문에, Eclipse Marketplace에 가서 별도로 Java 9 Support (BETA) for Oxygen 4.7 플러그인을 설치해서 사용해야 한다. 

본인은 BETA!!라고 써있는 것을 보고, 억지로 맞춰서 쓰는 느낌이라 그냥 새로운 IDE 배포를 기다리기로 했다;